I've been playing with it some more. I reloaded the latest firmware and it appears to have had some positive effect. Now I can select words within epubs and the definitions come up at the bottom, but if I go into the dictionary via the home menu button about 4 out of 5 times it just locks up. I can't enter any text via the soft keyboard and then I have to repeatedly press the back arrow and home to get out of it. The Dictionary force close popup eventually shows up. I also noticed that sometimes after it crashes I cannot get back into any book (the reader application locks up) and I have to do a device reset. Do you think if I use the rupor-rescue I can then scan each partition for bad clusters and attempt repair?